Eugenius

Eugenius (died 6 September 394) was Emperor of the Western Roman Empire from 22 August 392 to 6 September 394, succeeding Valentinian II and preceding Theodosius I. Though himself a Christian, he appointed pagan senators to key positions in the government, leading to conflict with the devoutly Christian Eastern Roman emperor Theodosius. Eugenius, along with the power behind his throne, the Frankish general Arbogast, were slain at the Battle of the Frigidus in 394.

Biography
Flavius Eugenius was a teacher of grammar and rhetoric before becoming magister scrinorum and befriending the Frankish magister militum Arbogast. Following the death of Valentinian II, Arbogast elevated Eugenius to the purple, making him his puppet emperor. Eugenius appointed new ministers to replace those appointed by Theodosius I before his cession of power to Valentinian, and many of the new ministers were pagan senators. While Eugenius himself was a Christian, he was persuaded to fund pagan projects, leading to conflict with the devoutly Christian Eastern Roman emperor Theodosius, who refused to recognize his election as emperor. In 394, their two armies met in battle at the Frigidus River in present-day Slovenia, and Arbogast committed suicide after the defeat, while Eugenius was beheaded as a criminal.